https://pubs.opengroup.org/togaf-standard/architecture-content/chap05.html#tag_05_02 Solution Building Blocks (SBBs) relate to the Solutions Continuum (see 6.4.2 Solutions Continuum), and may be either procured or developed. 5.2.4.1 Characteristics SBBs: Define what products and components will implement the functionality Define the implementation Fulfil business requirements Are product or vendor-aware 5.2.4.2 Specification Content SBB specifications include the following as a minimum: Specific functionality and attributes Interfaces; the implemented set Required SBBs used with required functionality and names of the interfaces used Mapping from the SBBs to the IT topology and operational policies Specifications of attributes shared across the environment (not to be confused with functionality) such as security, manageability, localizability, scalability Performance, configurability Design drivers and constraints, including the physical architecture Relationships between SBBs and ABBs